tree 88e35be655e440dbc3122ffdf67b1f62d3a4fc61
parent 8006c944b043d0cfa07cd8d8cccd686e30fe766d
author Kenneth Heitke <kheitke@codeaurora.org> 1392234264 -0600
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1392494128 -0800

spmi: Add MSM PMIC Arbiter SPMI controller

Qualcomm's PMIC Arbiter SPMI controller functions as a bus master and
is used to communication with one or more PMIC (slave) devices on the
SPMI bus.  The PMIC Arbiter is actually a hardware wrapper around the
SPMI controller that provides concurrent and autonomous PMIC access
to various entities that need to communicate with the PMIC.

The SPMI controller hardware handles all of the SPMI bus activity (bus
arbitration, sequence start condition, transmission of frames, etc).
This software driver uses the PMIC Arbiter register interface to
initiate command sequences on the SPMI bus.  The status register is
read to determine when the command sequence has completed and whether
or not it completed successfully.

Signed-off-by: Kenneth Heitke <kheitke@codeaurora.org>
Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>